Bianchi San Jose sizing for commuter???- Mtbr.com
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  1. #1
    mtbr member
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    Bianchi San Jose sizing for commuter???

    Interested in a BSJ with drop bars for a commuter. The nearest Bianchi dealer is 4 hours away. Not sure if I need a 52 or 55 (measured center to top). Read somewhere that the sizing is somewhat inconsistent between Bianchi models.

    Briefly test rode a 55 with flat bars last week and it seemed big with no clearance on the standover. Dealer has no 52 in stock.

    I'm 5'9 with 31" inseam. Usually ride 18" mtb or 54 roadbike.

    Anyone else have experience here?

    Thanks in advance,

    Dav

  2. #2
    Fat-tired Roadie
    Reputation: AndrwSwitch's Avatar
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    Do you own the 54cm road bike in question?

    I'm a big fan of the "magic number," effective top tube length. Measure the bike you have and compare to the geometry chart.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

  3. #3
    One Colorful Rider
    Reputation: Normbilt's Avatar
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    I would say a 55.
    I ride a 52 and I'm 5'6".
    The top tube seems short on a 52.
    If you have about an inch over top tube you should be fine

  4. #4
    Fat-tired Roadie
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    I'm a bit over 5'8" and I have a 52cm and two 55cm road bikes (one of which is too big - 20mm longer than the other.) So my results are inconsistent with Normbilt's and even between bikes with the same nominal size.

    I think it's okay to guestimate sizing based on comparing geometry charts with a bike you already have, or at least bikes you've test-ridden. But I'd say a height really only ballparks a rider into about three possible frame sizes. I wouldn't risk spending a bunch of money on a bike unless I was more sure than that.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

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